Abstract
The properties of confined excitons have been investigated under both biaxial compression and tension, which result upon cooling from the different thermal expansion coefficients of a thin GaAs/AlGaAs multiple quantum well (MQW) sample and various sample holders. Exciton transitions connected with higher subbands have been observed in optical transmission and identified by their temperature dependence using subband calculations based on an 8×8 k·p Hamiltonian with temperature and stress dependent band edge energies. We identify among others the “forbidden” L1-C2 transition.
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